condition	mean	min	max
4 h after light	16.6541	15.12	18.1882
8 h after light	10.389605	8.78981	11.9894
12 h after light	10.6697	10.4388	10.9006
4 h after dark	15.538633333333333	13.6298	17.3628
8 h after dark	19.2026	17.4816	22.3687
12 h after dark	19.765866666666668	19.3	20.328